POS1539 SAFETY AND EFFICACY OF UPADACITINIB IN PATIENTS WITH PSORIATIC ARTHRITIS AND INADEQUATE RESPONSE TO BIOLOGICS: 3-YEAR RESULTS FROM THE PHASE 3 SELECT-PSA 2 STUDY
Authors: P. J. Mease, A. Setty, K. Papp, F. Van den Bosch, S. Tsuji, M. Keiserman, K. Carter, R. Mccaskill, E. Mcdearmon-Blondell, P. Wung, W. Tillett
Journal: Annals of the Rheumatic Diseases (2023)

<h3>Background</h3> The efficacy and safety of upadacitinib (UPA) in patients (pts) with psoriatic arthritis (PsA) and inadequate response to ≥1 biologic disease-modifying antirheumatic drug (bDMARD-IR) have been demonstrated up to 56 and 104 weeks of treatment <sup>[1,2]</sup>. <h3>Objectives</h3> To assess the long-term safety and efficacy of UPA in bDMARD-IR pts with PsA through 152 weeks of treatment in the SELECT-PsA 2 study. <h3>Methods</h3> Pts were randomized to receive UPA 15 or 30 mg once daily (QD), or placebo (PBO) for 24 weeks, followed by blinded switch to UPA 15 or 30 mg QD for pts initially randomized to PBO. After 56 weeks, pts continued their assigned dose up to 152 weeks in an open-label extension (OLE). Following approval of the 15 mg QD dose, the protocol was amended and all pts on UPA 30 mg QD were switched to the approved dose (earliest switch at week 116). Endpoints assessed at 152 weeks included: % of pts achieving 20/50/70% improvement in American College of Rheumatology (ACR) criteria, minimal disease activity (MDA), and 75/90/100% improvement in Psoriasis Area and Severity Index, as well as patient-reported outcomes. Efficacy data were evaluated using non-responder imputation (NRI) and as-observed (AO) data (binary endpoints), and mixed effect model for repeated measures (continuous endpoints). Treatment-emergent adverse events (TEAEs) through 3 years (cut-off date, 05 May 2022) are also reported. <h3>Results</h3> Of the 641 pts randomized to receive UPA 15 or 30 mg QD, or PBO followed by UPA 15 or 30 mg QD (n=211, 218, 106, and 106, respectively), 478 entered the OLE. Improvements in efficacy outcomes with UPA observed at 56<sup>1</sup> and 104<sup>2</sup> weeks were maintained through the OLE, with ACR20 achieved by 43–51% (NRI) and 79–87% (AO) of pts across treatment arms at week 152. The highest % of MDA responders at week 152 (31% [NRI] and 44% [AO]) were in the continuous UPA 15 mg arm (<b>Table 1</b>). UPA was well tolerated through 152 weeks, with no new safety signals identified. The overall exposure-adjusted event rates for any TEAE were higher for UPA 30 vs 15 mg (295 vs 226 events/100 PY, respectively [<b>Figure</b>]). <h3>Conclusion</h3> Observed improvements in the signs and symptoms of PsA with UPA were maintained through 3 years of treatment in bDMARD-IR pts. The long-term safety profile of UPA in this treatment-refractory population was consistent with its known safety profile across indications. <h3>References</h3> [1]Mease PJ, et al. <i>Rheumatol Ther</i> 2021;8:903–919 [2]Mcinnes I, et al. <i>Rheumatol Ther</i> 2022. doi.org/10.1007/s40744-022-00499-w <h3>Acknowledgements</h3> AbbVie funded this study; contributed to its design; participated in data collection, analysis, and interpretation; and participated in the writing, review, and approval of the abstract. AbbVie and the authors thank all study investigators for their contributions and the patients who participated in this study. No honoraria or payments were made for authorship. Medical writing support was provided by Katerina Betsista, MD, of 2 the Nth (Cheshire, UK), and was funded by AbbVie. <h3>Disclosure of Interests</h3> Philip J Mease Grant/research support from: AbbVie, Amgen, Boehringer Ingelheim, Bristol Myers Squib, Celgene, Galapagos, Genentech, Gilead, GlaxoSmithKline, Janssen, Lilly, Novartis, Pfizer, Sun Pharma, and UCB, Arathi Setty Employee of: AbbVie, and may own stock or options, Kim Papp Speakers bureau: AbbVie, Akros, Allergan, Almirall, Amgen, Bausch Health, Boehringer Ingelheim, Bristol Myers Squibb, Celgene, Dermavant, Dermira, Eli Lilly and Company, Galderma, Genentech/Roche, Janssen, Kyowa Kirin, LEO, Meiji, Merck Sharp &amp; Dohme, Novartis, Pfizer, Regeneron, Sanofi Genzyme, Sienna Pharmaceuticals, Sun Pharma, Takeda, UCB, and Valeant, Consultant of: AbbVie, Akros, Allergan, Almirall, Amgen, Arcutis, Avillion, Bausch Health, Boehringer Ingelheim, Bristol Myers Squibb, Celgene, Dermavant, Dermira, Eli Lilly and Company, Galderma, Genentech/Roche, GlaxoSmithKline, Janssen, Kyowa Kirin, LEO, Meiji, Merck Sharp &amp; Dohme, Novartis, Pfizer, Regeneron, Sanofi Genzyme, Sienna Pharmaceuticals, Sun Pharma, Takeda, UCB, and Valeant, Filip van den Bosch Speakers bureau: AbbVie, Bristol Myers Squibb, Celgene, Eli Lilly, Galapagos, Janssen, Merck, Novartis, Pfizer, Sanofi, and UCB, Consultant of: AbbVie, Bristol Myers Squibb, Celgene, Eli Lilly, Galapagos, Janssen, Merck, Novartis, Pfizer, Sanofi, and UCB, Shigeyoshi Tsuji Speakers bureau: AbbVie, Eli Lilly, Janssen, Novartis, and UCB, Consultant of: AbbVie, Eli Lilly, Janssen, Novartis, and UCB, Grant/research support from: AbbVie, Eli Lilly, Janssen, Novartis, and UCB, MAURO KEISERMAN Speakers bureau: AbbVie, Bristol Myers Squibb, Celgene, Eli Lilly, Roche, Novartis, Pfizer, Janssen, and UCB, Grant/research support from: AbbVie, Bristol Myers Squibb, Celgene, Eli Lilly, Roche, Novartis, Pfizer, Janssen, and UCB, Kyle Carter Employee of: AbbVie, and may own stock or options, Reva McCaskill Employee of: AbbVie, and may own stock or options, Erin McDearmon-Blondell Employee of: AbbVie, and may own stock or options, Peter Wung Employee of: AbbVie, and may own stock or options, William Tillett Speakers bureau: AbbVie, Amgen, Celgene, Eli Lilly, Janssen, Novartis, Pfizer, and UCB, Consultant of: AbbVie, Amgen, Celgene, Eli Lilly, MSD, Novartis, Ono Pharma, Pfizer, and UCB, Grant/research support from: AbbVie, Celgene, Janssen, Eli Lilly, Pfizer, and UCB.